Op is no need to know the percentage of each person portfolios but you can also the diversification of the person's investment. You don't have to know because that is a private affair. And as for me I am only invest in Bitcoin and Eloncoin altcoin. And the two are doing great. Though Eloncoin is just a new project that hit the market recently and it is doing well. Diversification of investment is good and it is also dangerous because altcoins are not reliable. They can disappoint someone at anytime.
Dissapointment, we're suppose to adhered to that outcome by now, and never to expect or depend on crypto projects 100% because they have failed most traders in the past. This is not the first, second or third time but it will continue to keep failing, not all but severally will fall out of line. What's the essence of knowing or having the idea of what the next trader is having in his or her portfolio? We're completely on our own and we take decisions that are helpful to us other than sticking to just one project that we're not gaining any substantial profits from the project. Everyone remained discreet in the system, there's nothing new because the system.